Power converter with novel transformer structure for wireless power transfer using a DD2Q power receiver coil set

Few reports have researched on utilization of laser power conversion systems for wireless power transfer in aeronautical applications. III–V compound semiconductors are commonly used as photovoltaic (PV) power converters in the previous studies. We propose the prospects of using organic absorbers as PV power converters. For laser power conversion to be applied for portable devices, the PV module should be easily processable, thin, low-weight, and printable on flexible substrates. Organic PVs provide all the above advantages, and thus, could serve as a potential candidate for laser power harvesting applications. Moreover, they can also be made transparent, which could be utilized in power harvesting lamination coatings and windows. We had simulated the possibility of using single-junction and tandem photovoltaic structures for 670 nm and 850 nm laser power harvesting. FDTD simulations were conducted to optimize the PV structure in order to maximize the absorption at the laser wavelengths. A maximum PCE of 16.17% for single-junction PV and 24.85% for tandem PV was theoretically obtained.

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Free-Positioning Wireless Power Transfer Using a 3D Transmitting Coil for Portable Devices

Journal of Electromagnetic Engineering and Science ◽

10.26866/jees.2020.20.4.270 ◽

2020 ◽

Vol 20 (4) ◽

pp. 270-276

Author(s):

Nam Ha-Van ◽

Hoang Le-Huu ◽

Minh Thuy Le ◽

Kwangsuk Park ◽

Chulhun Seo

Keyword(s):

Three Dimensional ◽

Wireless Power Transfer ◽

Receiver Coil ◽

Portable Devices ◽

Power Transfer ◽

Wireless Power ◽

Transfer Energy ◽

Resonant Coupling ◽

Power Transfer Efficiency ◽

Receiving Coil

The free-positioning wireless power transfer (WPT) system has drawn attention in recent years. Traditionally, a WPT system can transfer energy in one or two directions on the same plane, but it leads the restrictions of angle and axis misalignment between a transmitter and a receiver coil. In this paper, we propose a free-positioning WPT system using a three-dimensional cubic-shaped transmitting coil for portable device charging. A small receiving coil is placed inside the transmitter to achieve the transferred energy through the magnetic resonant coupling. In addition, the equivalent circuit and the mutual inductance between the Tx and Rx coils are analyzed. Finally, a practical experiment is implemented to verify the transfer performance, which can reach up to about 50% power transfer efficiency. The proposed system can charge in spatial freedom.

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Effect of Coil Structure on the Efficiency of Wireless Power Transfer System

International Journal of Innovative Technology and Exploring Engineering - Special Issue ◽

10.35940/ijitee.a6123.129219 ◽

2019 ◽

Vol 9 (2) ◽

pp. 3387-3392

Keyword(s):

Wireless Power Transfer ◽

Receiver Coil ◽

Transfer System ◽

Wireless Charging ◽

Power Transfer ◽

Wireless Power ◽

Charging System ◽

Coil Structure ◽

Power Transfer Efficiency ◽

Wireless Power Transfer System

A typical magnetic resonance based wireless power transfer (WPT) system comprises a transmitter coil and an embedded receiver coil used for wireless charging of the electrical and electronics devices. It has been investigated that the coil structure influence the power transfer efficiency of the wireless charging system .The investigations have been carried out in order to determine a suitable coil type and geometry so as to achieve higher efficiency of a wireless power transfer system. The present investigation will afford the design strategy for an efficient wireless charging system .

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EFFECT OF NUMBER OF TURNS AND MEDIUM BETWEEN COILS ON THE WIRELESS POWER TRANSFER EFFICIENCY OF AIMD’S

Biomedical Engineering Applications Basis and Communications ◽

10.4015/s1016237219500169 ◽

2019 ◽

Vol 31 (02) ◽

pp. 1950016

Author(s):

B. P. Patil ◽

Deepali Newaskar ◽

Kunal Sharma ◽

Tarun Baghmar ◽

Mahesh Ku. Rajput

Keyword(s):

Human Body ◽

Wireless Power Transfer ◽

Secondary Coil ◽

Receiver Coil ◽

Power Transfer ◽

Wireless Power ◽

Cardiac Pacemakers ◽

Implantable Medical Devices ◽

Body Tissues ◽

Research Experiment

Active implantable medical devices (AIMDs) like implantable cardiac pacemakers play very important role in extending lives of patients with some cardiovascular diseases. The life of implantable device depends on life of battery. If this device can be charged from outside with power transfer device, then the cost of surgical procedures for patient can be saved. One must ensure, while transferring this power there should not be any abnormal effect on human body tissues. Wireless recharging of such devices through magnetic resonant coupling is of concern and hence the topic of more research to have uninterrupted supply from battery. The technique of wireless power transfer, primary or transmitting coil is assumed to be on body and receiver coil is assumed to be inside the human body. Several critical aspects need to be studied while designing coil for wireless power transfer (WPT). One of which is choice of operational frequency. In this research experiment, designed circuit is tested for checking power transfer was studied. Effect of the distance between primary and secondary coil affects the efficiency of power transfer. Authors also tied to test this for using different medium like air, placing 80 GSM paper and cloth. It is found that the medium between the primary and secondary affects the transfer of power. Careful thought needs to be given while designing power transfer system.

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Wireless power transfer system with a simple receiver coil

2011 IEEE MTT-S International Microwave Workshop Series on Innovative Wireless Power Transmission: Technologies, Systems, and Applications ◽

10.1109/imws.2011.5877107 ◽

2011 ◽

Cited By ~ 5

Author(s):

T. Miyamoto ◽

S. Komiyama ◽

H. Mita ◽

K. Fujimaki

Keyword(s):

Wireless Power Transfer ◽

Receiver Coil ◽

Transfer System ◽

Power Transfer ◽

Wireless Power ◽

Wireless Power Transfer System

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Wireless Power Transfer Through Inductive Coupling For Aimds

International Journal of Innovative Technology and Exploring Engineering - Special Issue ◽

10.35940/ijitee.k1258.0981119 ◽

2019 ◽

Vol 8 (11) ◽

pp. 138-141

Keyword(s):

Human Body ◽

Wireless Power Transfer ◽

The Body ◽

Battery Life ◽

Receiver Coil ◽

Implantable Cardioverter Defibrillators ◽

Power Transfer ◽

Wireless Power ◽

Cardiac Pacemakers ◽

Resonance Coupling

For the patients with some cardiovascular diseases, implantable devices like implantable cardiac pacemakers and implantable cardioverter defibrillators play a very important role. The life of implantable device is limited by the life of battery and the size of implanted device is dependent on size of battery. More life of battery demands larger battery size. Since these devices are implanted inside the human body, they must be small in size as well as of long battery life. Wireless re-charging of such devices can only be the solution to reduce the size and increase life of AIMDs. Wireless recharging by magnetic resonance coupling in less time is expected and hence this topic is considered for more research to have uninterrupted power supply from battery. Selection of operating frequency for transfer of power wirelessly is of great concern as it requires attention towards certain guidelines as basic restrictions provided by International Commission on non-ionizing Radiation Protection (ICNIRP). With lower frequencies used for power transfer, the efficiency would be less whereas with higher frequencies efficiency would be higher but with the use of higher frequencies for power transfer certain biological issues needs attention like tissue heating. In the technique of wireless power transfer, the transmitting coil is assumed to be outside the body and receiver coil is considered to be inside the human body above the pacemaker shell. The efficiency of power transfer is affected by frequency for power transfer and distance between the two coils.

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Simulation Analysis of Wireless Power Transfer for Future Office Communication Systems

International Journal of Innovative Technology and Exploring Engineering - Special Issue ◽

10.35940/ijitee.i1084.0789s19 ◽

2019 ◽

Vol 8 (9S) ◽

pp. 533-538

Keyword(s):

Output Power ◽

Communication Systems ◽

Wireless Power Transfer ◽

Secondary Coil ◽

Receiver Coil ◽

Input Frequency ◽

Power Transfer ◽

Wireless Power ◽

Primary Coil ◽

Transmitter Coil

A Wireless Power Transfer system consists of a transmitter coil which is inductively coupled with secondary coil and is popular for wireless charging of future office communication system. Wireless power transfer is used in different applications ranging from mobile chargers to charging stations. In this paper simulation of Wireless Power Transfer for future office communication systems has been conducted over Maxwell 3d of Ansys electromagnetic suite. The input frequency of primary coil is varied from 1kHz -120kHz with respect to the change in resonant capacitance and observed that input frequency between 20kHz-30 kHz, the output power in secondary coil appears to be maximum at variable distances between transmitter coil and receiver coil. There is an improvement of 72% seen in the output power of secondary coil for 25kHz input frequency of primary coil as compared with 40kHz input frequency. This model can be helpful to design future Office Communication systems for charging the mobile phones, Laptops and to turn on the printer wirelessly.

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Simulation-Assisted Design Process of a 22 kW Wireless Power Transfer System Using Three-Phase Coil Coupling for EVs

Sustainability ◽

10.3390/su132112257 ◽

2021 ◽

Vol 13 (21) ◽

pp. 12257

Author(s):

Chia-Hsuan Wu ◽

Ching-Ming Lai ◽

Tomokazu Mishima ◽

Zheng-Bo Liang

Keyword(s):

High Power ◽

Coupling Coefficient ◽

High Efficiency ◽

Design Procedure ◽

Wireless Power Transfer ◽

Power Converter ◽

Air Gap ◽

Power Transfer ◽

Wireless Power ◽

Three Phase

The objective of this paper is to study a 22 kW high-power wireless power transfer (WPT) system for battery charging in electric vehicles (EVs). The proposed WPT system consists of a three-phase half-bridge LC–LC (i.e., primary LC/secondary LC) resonant power converter and a three-phase sandwich wound coil set (transmitter, Tx; receiver, Rx). To transfer power effectively with a 250 mm air gap, the WPT system uses three-phase, sandwich-wound Tx/Rx coils to minimize the magnetic flux leakage effect and increase the power transfer efficiency (PTE). Furthermore, the relationship of the coupling coefficient between the Tx/Rx coils is complicated, as the coupling coefficient is not only dominated by the coupling strength of the primary and secondary sides but also relates to the primary or secondary three-phase magnetic coupling effects. In order to analyze the proposed three-phase WPT system, a detailed equivalent circuit model is derived for a better understanding. To give a design reference, a novel coil design method that can achieve high conversion efficiency for a high-power WPT system was developed based on a simulation-assisted design procedure. A pair of magnetically coupled Tx and Rx coils and the circuit parameters of the three-phase half-bridge LC–LC resonant converter for a 22 kW WPT system are adjusted through PSIM and CST STUDIO SUITE™ simulation to execute the derivation of the design formulas. Finally, the system achieved a PTE of 93.47% at an 85 kHz operating frequency with a 170 mm air gap between the coils. The results verify the feasibility of a simulation-assisted design in which the developed coils can comply with a high-power and high-efficiency WPT system in addition to a size reduction.

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